JPH01125752A - Magnetic recording/reproducing device - Google Patents

Abstract

PURPOSE:To directly mount tape cassettes with different sizes by extending a guide groove, and enabling a tape loading member to be moved to a first position to be fitted in the tape cassette or to a second position to be fitted in a small tape cassette corresponding to the tape cassette. CONSTITUTION:The guide grooves 7 and 8 are extended to a tape cassette side corresponding to the loading position of a reference type tape cassette and that of the small tape cassette. And the tape loading members 10 and 11 provided movably along the guide grooves 7 and 8 are driven by a loading driving mechanism 9, and they are moved to a first unloading position to be fitted in the tape cassette at the time of loading the reference type tap cassette, and are moved to a second unloading position to be fitted in the small tape cassette 3 at the time of mounting the small tape cassette 3. In such a way, it is possible to mount the reference type tape cassette and the small tape cassette selectively on one device.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording/reproducing apparatus, and more particularly to a magnetic recording/reproducing apparatus configured so that tape cassettes of different sizes can be loaded therein.

Conventional technology For example, in a magnetic recording/reproducing device such as a video tape recorder, when a tape cassette is installed in the device, a tape loading member fits into the tape cassette, and the tape loading member moves along a guide groove.
The tape in the tape cassette is pulled out and wound around the outer periphery of the rotating drum for magnetic recording/reproduction.

The tape cassette installed in the video tape recorder has, for example, the external shape and size of the casing, the shape of the recess into which the tape loading member, tape tension ball, etc. are fitted, the shape of the tape reel, and the difference between the supply side and take-up side. The distance between tape reels, etc. has been standardized. Therefore, in a magnetic recording/reproducing device, a non-standard tape cassette that is different from a standard tape cassette cannot be inserted into the device.

However, small tape cassettes that are smaller than the standard tape cassettes mentioned above are used for video cameras.
In order to attach this small tape cassette to a device for standard tape cassettes, a separate adapter is prepared, and the small tape cassette is attached via this adapter.

Problems to be Solved by the Invention However, as described above, in order to attach a small tape cassette to a device for standard tape cassettes, it is necessary to prepare the above-mentioned adapter, and furthermore, it is necessary to prepare the above-mentioned adapter. After that, the adapter must be attached to the device, so in conventional devices, there is a problem in that the operation of attaching the small tape cassette is troublesome.

In particular, the positions of the tape loading member and tape tension ball when installing a tape cassette are different between a standard tape cassette and a small tape cassette, so it is now possible to directly install a standard tape cassette and a small tape cassette into one device. It was difficult to do.

Therefore, it is an object of the present invention to provide a magnetic recording/reproducing device that solves the above-mentioned problems.

Means and Effects for Solving the Problems The present invention provides the magnetic recording/reproducing apparatus described above, in which the guide groove is extended to a position where a small tape cassette smaller than the tape cassette is installed, and according to the installed tape cassette, The tape loading member is movable to a first position where it is inserted into a tape cassette or a second position where it is inserted into a small tape cassette, so that tape cassettes of different thickness can be directly loaded without using an adapter or the like. It is designed so that it can be worn.

Embodiment FIGS. 1 and 2 show an embodiment of the magnetic recording/reproducing apparatus according to the present invention.

In both figures, the magnetic recording/reproducing device W11 is directly loaded with a standard tape cassette 2 (indicated by the dashed line in Fig. 1) or a small tape cassette 3 (indicated by the dashed line in Fig. 4). It is configured so that it can be done.

Before explaining the configuration of the apparatus 1, the standard tape cassette 2 and the small tape cassette 3 will be explained first.

The standard tape cassette 2 has a housing 2 as shown in FIG.
A supply side reel and take-up side reel (both not shown)
A tape 12c is provided on the front surface of the housing 2a to protect the front tape path 2b. In addition, the bottom of the housing 2a has a hub hole 2d for the supply reel, a hub hole 2e for the take-up reel,
A hole 2f into which a light emitting element for tape end detection is inserted is open.

Roughly on the front side of the bottom of the housing 2a are a guide roller 10b of a loading member 10 on the supply side, which will be described later, and an inclined ball 10.
c and a recess 2g into which the tension ball 13a is fitted;
A recess 2h into which a guide roller 11b1 of a winding-side loading member 11, an inclined pole 11C, a half-loading ball 25, and a guide ball 23, which will be described later, are fitted is formed.

As shown in FIGS. 4(A) and 4(B), the small tape cassette 3 has a housing 3a with a hole 13b on the front surface, and a hub hole 3C for a take-up reel (not shown) is opened at the bottom. are doing.

Also, a take-up reel (not shown) is provided at the bottom and side of the housing 3a.
A part of the gear 3d provided in the body is exposed.

Further, on the front side of the bottom of the small tape cassette 3, there is a recess 3f into which a guide roller 10b1 on the supply side, an inclined ball 10C, and a tension ball 13a, which will be described later, are fitted, and a guide roller 11b, an inclined ball 11C, and a half-loading ball 25 on the winding side, which will be described later. A recess 3q into which the guide ball 23 and the light emitting element 35 fit are formed.

In this way, the standard tape cassette 2 and the small tape cassette 3 not only differ in size and external shape, but also differ in the distance between the supply reel and the take-up reel.
Furthermore, the method of driving the take-up reel is also different.

In order to install the standard type tape cassette 2 and the small tape cassette 3 in the same mounting M1, as shown by the broken line in FIG. and the hub hole 3C of the small tape cassette 3 are aligned.

As a result, the recess 3f of the small tape cassette 3.

, :l, 3h is the fourth part 2g of the standard type tape cassette 2.

It is located inside the tape cassette from 2h.

Next, the schematic configuration of the device @1 will be explained.

As shown in FIG. 1, a drum base 5 is mounted and fixed on the chassis 4, and a rotating drum 6 having a magnetic head (not shown) is provided on the drum base 5. Furthermore, arc-shaped guide grooves 7.8 are bored in the chassis 4 on both the left and right sides of the rotating drum 6.

This guide groove 7.8 corresponds to the mounting position of the standard type tape cassette 2 shown in Fig. 3 and the mounting position of the small tape cassette 3 shown in Fig. 4, and is extended toward the tape cassette side compared to the conventional device. There is. Note that the guide groove 8 on the tape winding side (right side) is formed longer than the guide groove 7 on the tape supply side (left side).

10.11 is a tape loading member, and guide groove 7.
Insert the bottle (not shown) on the bottom side into the guide groove 7,
Loading base 1 movably provided along 8
0a, 11a, guide rollers 10b, 11c vertically extending from the loading bases 10a, 11a, and the loading base 10a.

An inclined ball 10c projects obliquely from 11a.

11C. Also, tape loading member 10.
Reference numeral 11 is driven by a loading drive 9, which will be described later, and moves to the first unloading position (shown in Fig. 1) where the standard tape cassette 2 is inserted into the tape cassette 2 when the standard tape cassette 2 is installed. When the tape cassette 3 is loaded, it moves to the second unloading position (shown in FIG. 5 (Δ)) where the tape cassette 3 is inserted into the small tape cassette 3.

Further, V-shaped stoppers 5a and 5b are installed on the drum base 5 and project upward from the guide groove 7.8, and the tape loading members io and ii are moved along the guide groove 7.8 as described later. arrow Δ.

When moving in the B direction (shown in FIG. 1), the stopper 5a
, 5b and stops when tape loading is completed.

Note that a plate spring 12 that protrudes in the traveling direction is attached to the loading base 10a of the tape loading member 10 on the tape supply side.

Reference numeral 13 denotes a tension arm, which has a vertical tension ball 13a at its tip and is supported by a shaft 4a on the chassis 4. Further, one end of a coil spring 14 (indicated by a broken line in FIG. 1) is hooked to the arm portion 13b of the tension arm 13, and the other end of the coil spring 14 (indicated by a broken line in FIG. It is rotated counterclockwise by tensile force. Therefore, tension arm 13
When the tape loading member 10 on the supply side is within its rotation range, it contacts the loading base 10a and rotates following the movement of the loading base 10a.

Also, links 15a, 1 are provided in the middle of the tension arm 13.
A toggle member 15 is rotatably connected to the toggle members 5b in a dogleg shape, and one end of a brake band 16 is locked to this toggle member 15. The other end of the brake band 16 is a fixed member 17 fixed to the chassis 4.
The reel stand 18a is engaged with the reel stand 18a on the supply side and faces the outer periphery of the reel stand 18a on the supply side.

As shown in FIG. 1, the toggle member 15 is configured to be displaced in the shape of a hook, but not in the opposite direction. Therefore,
When the loading member 10 is in the first and second seven loading positions as shown in FIG. 1 and FIG. 5(A),
The toggle member 15 is displaced in a dogleg shape and the brake band 16
It absorbs the excess slack. Therefore, the brake band 16 does not slacken significantly and is spaced apart from the reel stand 18a.

Reference numeral 19 denotes a full-width performance head, which is placed and fixed on the erase base 20. The erase base 20 is rotatably supported by a shaft 20a, and has an impedance of 0-0 on its upper surface.
A roller 21 and a guide ball 22 are provided.

23 is a guide ball that stands vertically at the tip of the guide arm 24. 25 is a half-loading ball that stands vertically from the tip of the half-loading arm 26. The guide ball 23 and the half zeroing ball 25 are driven by a ball moving mechanism 27 (to be described later), and the arm 24.26 is driven by a ball moving mechanism 27, which will be described later. It is displaced into an unloading position 11 (as shown in FIG. 1) or a second unloading position (as shown in FIG. 5) which fits into the small tape cassette 3.

Reference numeral 28 denotes a guard ball that prevents the tape from sliding against the rotating drum 6 during half-loading, and extends vertically from the tip of the guard ball arm 29.

Note that the guide ball 23, half-loading ball 25, and guard ball 28 are displaced according to each mode, and details will be described later.

Reference numeral 30 denotes a capstan, which is rotated counterclockwise by a capstan motor 30a (indicated by a broken line in FIG. 1) disposed on the bottom side of the chassis 4.

31 is a pinch roller, an arc-shaped pinch roller arm 3
It is rotatably supported at the tip of the pin roller arm 32 during recording/reproduction, and is pressed against the capstan 30 by the upward and downward rotation of the pin roller arm 32 and the horizontal rotation of the base 33 that supports the pinch roller arm 32. do.

Details of the pinch roller drive mechanism 34 that operates the pinch roller 31 in this manner will be described later.

Reference numeral 35 denotes a light emitting element for tape end detection, which stands vertically from the tip of an arm 36 supported on the shaft 4b on the chassis 4.

Note that the arm 36 is urged to rotate counterclockwise by the tensile force of a coil spring 37. Normally, the arm 36 contacts the bin 4C protruding from the chassis 4, and is located at a position corresponding to the hole 2f of the standard tape cassette 2 (as shown in FIG. 1).

Also, when the small tape cassette 3 is installed, the arm 36
is pressed by the arm 24 rotating counterclockwise, and the light emitting element 35 is displaced to a position W1 (shown in FIG. 5) where it fits into the small tape cassette 3.

The general structure of the magnetic recording/reproducing bag W11 has been described above, and next, each mechanism for operating each member will be described in detail.

■ [Loading Drive Mechanism] As shown in FIG.
．． It is transmitted to a worm gear 43 via a gear 42 that meshes with a gear 41. Then, the main cam gear 44 that meshes with the worm gear 43 in the horizontal direction and the sub cam gear 45 that meshes with the worm gear 43 in the vertical direction rotate.

As shown in FIG. 6, the main cam gear 44 is rotated by a main gear 44' that is integral with the main cam gear 44.

It is transmitted via gears 46.47, 48.49 to a ring gear mechanism 50 which drives the loading member 10.11.

This ring gear mechanism 50 is disposed below the rotating drum 6, and includes a ring gear 50a meshing with the gear 49, and ring gears 50b and 5 disposed above the ring gear 50a.
0c.

Each of the ring gears 50a, 50b, and 50c is coaxially and rotatably supported by three O-ruars 51a, 51b, and 51c that are in sliding contact with the inner circumferential side.

Further, as shown in FIGS. 5(A) and 7(A), the base 10a of the tape loading member 10 on the supply side is connected to the ring gear 50a via a connecting member 55.

Note that one end of the connecting member 55 is connected to a sliding member 57 that is biased in the direction of arrow C by the tensile force of a coil spring 56 that is slidably provided on the ring gear 50a.

Further, as shown in FIGS. 5(A) and 7(C), the base 11a of the tape loading member 11 on the winding side is connected to the ring gear 50C via a connecting member 58. The connecting member 58 is connected to a sliding member 59 that is slidably provided on the ring gear 50C, and the sliding member 59 is biased in the direction of the arrow by the tensile force of the coil spring 60.

Therefore, the loading members 10.11 are moved along with the rotation of the ring gears 50a, 50b, 50c, respectively, and the guides 17.11.
Move along 8.

The rotation of the ring gear 50a is controlled by the gear 52. The signal is transmitted to the ring gear 50b via a gear 53a that meshes with the gear 52 and a gear 53b that is integrated with the gear 53.

Further, the rotation of the ring gear 50a is controlled by the gear 52. A small diameter gear 54a that meshes with the gear 52, and a gear 54 that is integrated with the gear 54a.
Furthermore, as shown in FIGS. 7(A), (B), and (C), the ring gear 50a has a gear portion 50 that meshes with the gear 49 on the outer periphery of the ring gear 50a.
a1 is formed within the range of angle α. Further, a gear portion 50b1 that meshes with the gear 53b is provided on the outer periphery of the ring gear 50b.
is formed within the range of angle β. Also, ring gear 50
A gear portion 50C+ that meshes with the gear 54b is formed on the outer periphery of c in the range of angle γ.

As shown in FIG. 5(B), ring gears bob and 50c are stacked and connected together.

The ring gears 50b and 50c are shown in FIG. 7(B), (
Because they are stacked as is in the state shown in C), the gear part 50
b1 and 50G+ partially overlap, and the teeth of each gear portion 50b1 and 50G+ are integrated with the same pitch.

Since the ring gear 50a is driven by the gear 49, the loading member 10 rotates at a constant speed from the unloading position to the loading completion position. However, the ring gear 50b.

As will be described later, 50c is driven at a constant speed via gears 53a and 53b (reduction ratio -1) until the loading member 11 reaches the half-loading position from the unloading position, and from the half-loading position to the loading completion position. is accelerated and driven via gears 54a and 54b (reduction ratio <1).

In this way, the ring gears 50b and 50c that move the tape loading member 11 on the take-up side are accelerated from the half-loading position and move from the guide groove 7 on the supply side to the take-up side, as shown in FIG. This is because the guide groove 8 has a longer overall length, and the tape loading member 10.1
This is to ensure that the two terminals reach the loading completion position at approximately the same time.

The tape loading member 10.11 rotates 1.1 of the ring gears 50a, 50b, 50c. : The machine moves from the first or second unloading position to the half-loading position and the loading completion position, pulls out the tape in the tape cassettes 2 and 3, and winds the tape around the rotating drum 6.

Further, by reverse rotation of the ring gears 50a, 50b, and 50c, the tape is returned from the loading completion position to the first or second unloading position, and the tape is returned to the tape cassette 2.3.

■ "Ball Moving Mechanism" As shown in FIGS. 1 and 2, the lower surface of the main cam gear 44 that meshes with the worm gear 43 is shown in FIGS.
The cam shown in D)? 7144a and 44b are formed.

A pin 61a of a slide lever 61 slidably provided in the directions of arrows X+ and Xzh is fitted into one cam 44a, and a pin 62atfi of a swing arm 62 is fitted into the other cam 44b.

The slide lever 61 has a bottle 61b vertically extending from the other end of the slide lever 61, and a leaf spring 63 that holds the bottle 61b.
It is connected to the fan-shaped gear 63 via a. , the fan-shaped gear 63 is rotatably supported by a pin 4d on the chassis 4.

Therefore, when the cam gear 44 rotates counterclockwise, the slide lever 61 slides in the direction of arrow X+ according to the rotation position of the cam groove 44b, and the sector gear 63 rotates clockwise accordingly. Furthermore, the rotation of the fan-shaped gear 63 is transmitted to the gear 24a of the arm 24 via the gear 64, as shown in FIG.

As a result, the arm 24 rotates clockwise, and the arm 24
As shown in the cam diagram of FIG. 9(a), the guide ball 23 provided at the tip of the main cam gear 44 is displaced to a position corresponding to each mode as the main cam gear 44 rotates.

Further, the rotation of the fan-shaped gear 63 is caused by the rotation of the gear 6 which meshes with the gear 64.
5a1 is transmitted to the gear 26a of the arm 26 having the half-loading ball 25 through a small diameter gear 65b1 which is integrated with this gear 65a and a gear 66 meshing with the small diameter gear 65b. Therefore, the arm 26 rotates according to the rotational position δ of the cam groove 44b, and the half-loading ball 25 moves to the ninth position.
As shown in the cam diagram in Figure (a), as the main cam gear 44 rotates, it is displaced to a position corresponding to each mode.

Further, the swing arm 62 is connected to a pin 67a of a swing gear 67 via a leaf spring 62b. Swing gear 67 is rotatably supported by pin 4e, and gear 68
It meshes with the Also, the swing gear 67 is a coil spring 6.
It is rotated counterclockwise by the tensile force of 9.

Therefore, as the cam gear 44 rotates clockwise,
The swing arm 62 that engages with the cam groove 448 rotates counterclockwise. As the swing arm 62 rotates, the swing arm 67 rotates clockwise, and the rotation is caused by the gear 6.
8 to the gear 29a of the arm 29 having the guard ball 28. Therefore, the arm 29 is connected to the cam 144.
The guard ball 28 rotates according to the rotational position of a.
As shown in the cam diagram in Figure (b), as the main cam gear 44 rotates, it is displaced to a position corresponding to each mode.

■ [Pinch Roller Drive Mechanism] As shown in FIG.
a, and is rotated upward by the elastic force of a torsion spring (not shown) wound around the shaft 33a. Therefore, the arm 32 rotates so that the pinch roller 31 moves upward. Also, the base 33 is the chassis 4
It is rotatably supported at the top.

As shown in FIG. 10, the upper surface of the main cam gear 44 is provided with a cam groove 44C for rotating the pinch roller and a cam 1lI44d for pressing the pinch roller.

A pin 70a of a slide lever 70 that is slidable in the directions of arrows Y+ and Y2 is fitted into this cam groove 44G. Further, one end of a rotating member 71 whose intermediate portion is rotatably supported is connected to the slide lever 70, and the other end of the rotating member 71 is connected to a slide rack 72 which slides in the arrow Y+ and Yz force directions. is connected to.

The slide rack 72 has a rack 72a that meshes with the gear 33b of the base 33.

Also, the arm 7 is attached to the cam fi44d for pinch 0-ra crimping.
3 pin 73a is engaged, and the arm 73 is engaged with pin 4f.
It is connected to two plates 74 and 75 which are supported on the. These two plates 74 and 75 are integrated by the tension of a coil spring 76.

The plate 75 is also provided with a bent portion 75a that comes into contact with a protruding pin 32a (shown in FIG. 2) at the intermediate portion of the arm 32 when the pinch roller arm 32 rotates. As will be described later, this bent portion 75a presses the pin 32a of the pinch roller arm 32 through the spring force of the recording/reproducing spring 76, and presses the pinch 0-531 onto the capstan 30.

Further, the sub cam gear 45 that meshes with the worm gear 43 in the vertical direction has a cam *45a, as shown in FIG. A pin 77a of an up-down arm 77 is engaged with this cam groove 458, and the up-down arm 77 is rotatably supported by a bracket 78. Furthermore, a roller 77b is provided at the end of the up-down arm 77.

The pinch roller arm 32 is rotationally biased so that the abutting portion 32b at the end abuts against the roller 77b of the up-down arm 77. Therefore, when the sub cam gear 45 rotates counterclockwise and the bin 77a moves inward, the up-down arm 77 rotates counterclockwise. and,
The pinch roller arm 32 rotates as the contact portion 32b is pressed upward by the roller 77a of the up-down arm 77, and the pinch roller 31 is lowered.

As shown in FIGS. 1 and 2, a reflection pattern (not shown) is formed on the front surface 45b of the cam gear 45 in order to detect the rotation angle for each mode. Further, three optical sensors 79 are provided at positions facing the front surface 45b of the cam gear 45, and the rotational position of the cam gear 45 is detected by a combination of detection signals obtained from the three optical sensors 79. In addition, main cam gear 44 and cam gear 45
Since they have the same diameter, the rotational position of the main cam gear 44 can also be detected from the detection signal of the optical sensor 79.

■ "Tension arm, erase base operation mechanism" As shown in Figs.
0a, and the loading base 10a moves to the first unloading position (tension ball 13
a is inserted into the recess 2Q of the standard tape cassette 2) or the second unloading position, and the tension ball 13a is located in the recess 3fi of the small tape cassette 3: 11
It rotates to a position where people can see people.

Therefore, the tension arm 13 is connected to the loading base 1.
0a moves in the direction of the arrow and rotates counterclockwise by the spring force of the spring 14.

As shown in FIG. 12, when the loading base 10a further moves in the direction of the arrow, the plate spring 12, which is spaced apart from the tension arm 13 but extends in the advancing direction, moves onto the sliding surface 20b on the lower side of the erase base 2o (see FIG. 12). drive while pressing (indicated by the broken line).

Therefore, the erase base 20 rotates counterclockwise around the shaft 20a, and its end 20c is attached to the tension arm 1.
3. Therefore, the tension arm 13 is pressed against the end 20G of the erase base 20.

Furthermore, when the loading base 10a moves in the direction of the arrow and reaches the loading completion position, the loading base 10a passes the erase base 20, so the erase base 20 rotates clockwise and returns to its original position.

As will be described later, the tension arm 13 further rotates counterclockwise from the position shown in FIG. 12 to fit the tension ball 13a into the recess 2Od of the erase base 20. As a result, the tension arm 13 reaches a position where a tape path is formed during recording/reproduction, and the toggle member 15 is extended linearly to bring the brake band 16 into sliding contact with the reel stand 18a on the supply side.

Furthermore, when returning from the loading completion state to the unloading position, the loading base 10a performs the opposite operation to the above, and the loading base 10a
When the loading base 10a returns, the plate spring 12 of the loading base 10a presses the sliding surface 20b of the erasing base 20. At that time, the erase base 20 rotates counterclockwise, and the end 2
The tension arm 13 is kicked at 0C, and as a result, the tension arm 13 rotates clockwise, causing the tension ball 13a to separate from the recess 20d.

(1) Next, the operation in each mode when the standard tape cassette 2 is loaded in the magnetic recording/reproducing apparatus having the above configuration will be explained.

As shown in Fig. 1, a standard tape cassette 2 (in Fig. 1,
When a cassette (indicated by a dashed line) is inserted into the apparatus, a cassette detection switch (not shown) detects the type of cassette. The motor 38 is rotated by a command from a control circuit (not shown), and rotates the worm gear 43 as described above.

The main cam gear 44 is driven by the worm gear 43,
Rotate 90 degrees clockwise as shown in FIG. 8(B).

This rotation of the main cam gear 44 is transmitted to the ring gear mechanism 50 as explained in the above-mentioned section (2) [Loading drive mechanism]. As a result, ring gear 50a rotates clockwise, and ring gears 50b and 50c rotate counterclockwise. and loading member 10.11
reaches the first loading position shown in FIG.

In addition, as explained in the above section ``Ball moving mechanism'', the ball moving mechanism 27 rotates as the main cam gear 440 rotates.
is operated to rotate arms 24,26 to the first unloading position shown in FIG. Also, tension arm 1
3 rotates to the first unloading position 4 following the loading member 10.

Therefore, when the standard tape cassette 2 is lowered to a predetermined mounting position in the apparatus, the guide balls 10b, 11b, the inclined balls 10G, 11G, and the
Tensicon ball 13a.

The guide ball 23 and half-loading ball 25 fit into the recesses 2Q and 2h of the standard tape cassette 2 shown in FIG. Also, a reel stand 18a.

The upper part of 18b is the hub hole 2d of the standard tape cassette 2,
At the same time, the light emitting element 35 is fitted into the hole 2.

Next, as shown in FIG. 8(C), the rotation of the motor 38 causes the main cam gear 44 to further rotate clockwise.

Therefore, the ring gear 50a.

50b, 50c will rotate further, and the tape loading member 10.11 will move into the recess 2.11 of the standard tape cassette 2. The distance is slightly shorter than G1.2h! Regarding i, move to the half-loading position (shown in FIG. 13). Further, the tension arm 13 follows the leading member 70 and separates from the fourth portion 2Q.

Furthermore, the guide ball 23 and the half-loading ball 25 that had been fitted into the recess 2h are moved toward the arrow x1 by the slide lever 61 that engages with the cam groove 44b of the main cam gear 44.
As it slides in the direction, it is displaced to the position shown in FIG. 13 with the arms 24, 26 rotating clockwise.

Therefore, the tape 80 pulled out from the standard tape cassette 2 is a two-point tape I! As shown in FIG. 13, the guide ball 10b, the guard ball 28°, the half-loading ball 25. A tape path is formed that returns into the tape cassette 2 via the guide ball 23. In addition, the Qi 780 has the guard ball 28 not yet displaced and the rotary drum 6
Since it is located in front of the guide drum 6, it passes through a position spaced apart from the outer circumference of the guide drum 6. Note that during half loading, the pinch roller 31 continues to move upward.

Further, as shown in FIG. 8(C), during half loading, the pin 6 of the swing arm 62 engages with the cam groove 448.
Since the swing arm 2a is located in the wide portion 44a1, the swing arm 62 can rotate slightly clockwise. Therefore, the arm 29 having the guard ball 28 can be rotated counterclockwise by the spring force of the spring 69 that biases the swing gear 67, thereby applying tension to the tape 80.

Here, operation 8 for recording or playback mode is performed. This recording/playback mode operation causes the motor 38 to further rotate,
The main cam gear 44 is rotated clockwise as shown in FIG. 8(D).

As the main cam gear 44 rotates, the pin 62a of the swing arm 62 that engages with the cam groove 448 is displaced inward, so the swing arm 62 rotates counterclockwise. Therefore, the arm 29 having the guard ball 28 is
As shown in FIG. 4, the loading member 11 is rotated largely clockwise to a position where it does not interfere with the movement of the loading member 11.

Main gear 44', which is integral with main cam gear 44, also rotates in the same direction, thereby causing ring gear 50a to further rotate clockwise and ring gears 50b and 50C to rotate counterclockwise. At this time, as described above, the gear portion 50b of the ring gear 50b and the gear 53b are disengaged, and the gear portion 50C1 of the ring gear 50c is disengaged.
The gear 54b meshes with the gear 54b. Therefore, the O-ding member 10 on the supply side moves in the direction of arrow 8 along the guide groove 7, and the loading member 11 on the winding side is further accelerated and moves in the direction of arrow 8 along the guide groove 8.

Therefore, as shown in FIG. 14, the loading members 10, 11 abut on the stoppers 5a, 5b substantially simultaneously while wrapping the tape 80 around the outer periphery of the rotating drum 6, respectively.

Loading base 10 in contact with stoppers 5a and 5b
a and 11b are ring gears 50a, respectively.

The spring force of the coil springs 56, 60 provided at 50c presses and holds the stoppers 5a, 5b.

As the loading member 10 on the supply side moves to the loading completion position shown in FIG. and the guide ball 22.

Therefore, the links 15a and 15b of the toggle member 15 connected in the middle of the tension arm 13 become straight.

Therefore, the tension arm 13 applies pack tension to the tape 80 by bringing the brake band 16 into sliding contact with the outer periphery of the reel stand 18 on the supply side via the toggle member 15.

Furthermore, as the main cam gear 44 rotates, the sub cam gear 45 (shown in FIG. 11) that meshes with the worm gear 43 rotates counterclockwise.

Therefore, as described above, the tape loading member 11 moves in the direction of arrow B along the guide groove 8, and the pinch roller 31 moves in the direction of arrow B.
After passing below, the up-down arm 77 rotates counterclockwise along the cam groove 45a of the sub-cam gear 45, as shown in the cam diagram of FIG. 9(C). Therefore, the contact portion 32b of the pinch roller arm 32 is pressed by the roller 77b of the up-down arm 77 and moves. Therefore, the pinch roller arm 32 rotates about the shaft 33a and lowers the r edge roller 31.

Also, cam grooves 44c, 44 on the upper surface side of the main cam gear 44
d also rotates clockwise as shown in FIG. 10(B), so the pin 70a of the slide lever 7o is displaced inward along the cam groove 44c, and the slide lever 70 is displaced in the direction of arrow Y2.

Further, since the pin 73a of the arm 73 is displaced in the outer circumferential direction along the cam groove 44d, the arm 73 rotates clockwise.

Therefore, as shown in FIG. 9(C), the pinch roller 3
1 is lowered, the slide lever 70 slides in the direction of arrow Y2, and this displacement is transmitted to the slide rack 72 via the rotating member 71. That is, the slide rack 72 slides in the direction of arrow Y1.

Therefore, the base 33 that engages with the rack 72a of the slide rack 72 rotates counterclockwise, and the pinch roller 31
The tape 80 is brought into contact with the capstan 30. Thereafter, as shown in FIG. 9(D), the arm 73 rotates clockwise, thereby causing the pair of plates 74 and 75 to rotate counterclockwise. As a result, the bent portion 75a of the plate 75 comes into contact with the protruding pin 32a of the pinch roller arm 32, and the spring force of the spring 76 urges the arm 32 in the counterclockwise direction.

In this way, the tape 80 is pressed toward the capstan 30 side by the pinch roller 31, runs toward the winding side, and is recorded or reproduced.

Note that the unloading operation is the opposite of the loading operation described above.

(2) Next, the case of mounting the small tape cassette 3 will be explained.

As shown in FIG. 5(A), the small tape cassette 3 (fifth
When a tape cassette (indicated by two points gin in the figure) is inserted into the apparatus, a cassette detection switch (not shown) detects that it is a small tape cassette.

Then, the motor 38 reversely rotates the worm gear 32 in response to a command from a control circuit (not shown), and rotates the main cam gear 4.
4 to the position shown in FIG. 8(A).

Due to the reverse rotation of the worm gear 32, the ring gear V mechanism 50
The ring gear 50c rotates clockwise, and the other ring gears 50b and 50c rotate counterclockwise. Therefore,
The loading member 10.11 moves toward the small tape cassette 3 from the first unloading position shown in FIG.

As the loading base 10a on the supply side moves, the tension arm 13 rotates in the 81 direction, as shown in FIG. 5(A).
The second unloading position shown in FIG. Further, due to the rotation of the cam groove 44b on the lower surface side of the main cam gear 44, the slide lever 61 that engages with the cam groove 44b slides in the two directions of the arrow.

Therefore, the aforementioned ball moving mechanism 27 operates, and the guide balls 23. The arm 24.26 with the half-loading ball 25 rotates counterclockwise as shown in FIG. 5(A). Therefore, the guide ball 23 and the half loading ball 25 are displaced from the first unloading position shown in FIG. 1 to the second unloading position corresponding to the small tape cassette 3.

Therefore, when the small tape cassette 3 is lowered to a predetermined mounting position within the apparatus, the guide balls 10b, 11b, the inclined balls 10c, 11c, the tension ball 13a, the guide ball 23, . The half-loading balls 25 fit into the recesses 3f, 3a, and 3h of the small cassette tape 3 shown in FIGS. 4(A) and 4(B).

Further, as the arm 24 rotates counterclockwise, the arm 36 having the light emitting element 35 rotates clockwise against the spring force of the spring 37. Therefore, the light emitting element 35 is also connected to the recess 3h of the small tape cassette 3 at the same time as the guide ball 23.
fit inside. Therefore, the light emitting element 35 does not get in the way when the small tape cassette 3 descends.

Further, as the small tape cassette 3 descends to the mounting position, the supply side reel stand 18a fits into the hub hole 3C. Furthermore, a drive gear (not shown) disposed on the lower side of the chassis 4 moves upward, and this drive gear meshes with the winding-side gear 3d. Therefore, the reel on the winding side is driven by this drive gear to wind up the tape.

Next, when the small tape cassette 3 is installed at a predetermined installation position, the motor 38 rotates in the same way as when the standard tape cassette 2 is installed, resulting in the half-loading state shown in FIG. 13. At this time, since the arms 24 and 26 rotate clockwise, the arm 36 having the light emitting element 35
is returned to the original tape end detection position by the spring force of the spring 37.

Furthermore, by operating the recording/playback mode, the same operation as with the standard tape cassette described above is performed.
The state shown in FIG. 14 is reached. In addition, in the fast forward 7 rewind mode, the half loading state shown in Fig. 13 will occur.
To run a tape at high speed without bringing it into sliding contact with a rotating drum 6 and a capstan 30.

Effects of the Invention As described above, the magnetic recording/reproducing device according to the present invention allows standard tape cassettes and small tape cassettes of different sizes and shapes to be selectively installed in one device. Since the small tape cassette can be directly installed into the device without using an adapter as in the conventional case, there is no need to prepare an adapter and there is no need for troublesome adapter installation operations. Furthermore, the loading member that pulls out the tape from inside the tape cassette can stably move to the first position or the second 4D position depending on the standard type tape cassette and the small tape cassette, and is suitable even if the tape cassette is different. can form a tape bath. In addition, it has the advantage that it can be manufactured at a relatively low cost because it has a relatively simple structure and is compatible.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the magnetic recording/reproducing device according to the present invention, Fig. 2 is a side view thereof, Fig. 3 is a perspective view for explaining a standard tape cassette, and Fig. 4 is a small-sized 5 is a perspective view for explaining the tape cassette, FIG. 5 is a diagram showing the state when a small tape cassette is attached, FIG. 6 is a plan view showing the ring gear mechanism, FIG. 7 is a plan view of each ring gear, and FIG. The figure shows the cam groove on the bottom side of the main cam gear.
Figure 9 is a cam diagram, Figure 10 is a plan view showing the cam groove on the top side of the main cam gear, Figure 11 is a rear view of the device as seen from the rear, and Figure 12 is for explaining the operation of the tension arm. FIG. 13 is a plan view during half loading, and FIG. 14 is a plan view during recording/reproduction mode. DESCRIPTION OF SYMBOLS 1... Magnetic recording/reproducing device, 2... Standard tape cassette, 3... Small tape cassette, 6... Rotating drum, 7.8... Guide groove, 9... Loading drive 111m Structure, 10.11... Tape loading member, 13... Tension arm, 13a... Tension ball, 15... Toggle member, 16... Brake band, 19... Full width erasing head, 23...・Guide ball, 25 ・Half loading ball, 28・
...Guard ball, 30...Capstan, 31...
・Pinch roller, 32...Pinch roller arm, 34
... pinch roller drive mechanism, 35 ... light emitting element, 3
8...Motor, 44...Main cam gear, 44a,
44b, 44c, 44d...Cam groove, 45...Sub cam gear, 45a...Cam groove, 50-...Ring gear mechanism, 50a, 50b, 50c...Ring gear, 61
...Slide lever, 62...Swing arm, 7
0...Slide lever, 71...Rotating member, 77.
・Up-down arm. Figure 8

Claims (2)

[Claims] (1) Magnetic recording/ In the playback device, the guide groove is extended to a position where a small tape cassette smaller than the tape cassette is installed, and a first position where the tape loading member is inserted into the tape cassette according to the installed tape cassette. , or a second tape that fits into the small tape cassette.
A magnetic recording/reproducing device characterized in that it is movably provided at a position. (2) When a tape cassette is installed, a tape loading member is fitted into the tape cassette, and the tape inside the tape cassette is wound around the outer periphery of a rotating drum by the tape loading member that moves along the guide groove. In the playback device, the guide groove is extended to a position where a small tape cassette smaller than the tape cassette is installed, and a first position where the tape loading member is inserted into the tape cassette according to the installed tape cassette. , or a second tape that fits into the small tape cassette.
a first position in which a tension member is movably provided and pressed against the tape loading member to apply tension to the tape, and the tension member is fitted into the tape cassette as the tape loading member moves; Alternatively, a magnetic recording/reproducing device characterized in that it is displaced to a second position where it fits into the small tape cassette.